JOHN R MATHIAS
Allopathic & Osteopathic Physicians|Internal Medicine|Gastroenterology HOUSTON, TX NPI 1639239643
Browse related groups: Allopathic & Osteopathic Physicians|Internal Medicine|Gastroenterology TX IRONWOOD PHARMACEUTICALS, INC All categories
General Payments — all program years on this page
$896.35
- Category: General Payments
- Program years: PY2018–2021
- Record count: 63
- As of (CMS publication): 2026-01-23
Latest program year (PY2021): $201.16 across 11 records · disputed records: 0
Financial relationships do not necessarily indicate an improper relationship; the data is open to interpretation.
How this figure is calculated
- The total is the sum of the General Payments records CMS published for the labeled program year(s), exactly as published. Nothing is estimated, weighted, or combined across categories.
- General Payments only. Research and Ownership/Investment are separate datasets and are never summed with these figures; amounts are kept separate per program year.
- Featured-page threshold (a presentation gate, not a judgment): records>=3 OR total>=100 (all years).
- Methodology & Data — sourcing, labeling, and limitations.
By nature of payment
Latest program year (PY2021) · sorted by reported total.
| Nature of payment | Amount | Records |
|---|---|---|
| Food and Beverage | $201.16 | 11 |
By paying entity
Latest program year (PY2021) · sorted by reported total.
| Paying entity | Amount | Records |
|---|---|---|
| IRONWOOD PHARMACEUTICALS, INC | $76.06 | 4 |
| ABBVIE INC. | $55.12 | 3 |
| Takeda Pharmaceuticals U.S.A., Inc. | $28.53 | 2 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $23.72 | 1 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | $17.73 | 1 |
By program year
Records — PY2021 (11)
Provenance & corrections
- Dataset: CMS Open Payments — General Payments
- Source: CMS Open Payments dataset (bulk file)
- Publisher of source data: Centers for Medicare & Medicaid Services
- Generated from: OP_DTL_GNRL_PGYR2021_P01232026_01102026.csv
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Corrections to the substance of a record route to CMS through its review-and-dispute process; errors in how this site mirrors or displays a record route to us. Both paths are described in Methodology & Data.